.main .focus ul li{
    width: 150px;
}
.main_bd h2{
    margin-top: 40px;
    text-align: center;
    font-weight: 400;
    font-size: 16px;
}
.main_bd h2 p{
    font-size: 12px;
}
.main_bd>p{
    margin: 5px auto 0 auto;
    padding-left: 14px;
    width: 800px;
    height: 30px;
    line-height: 30px;
    background-color: rgb(245, 245, 245);
}
.pic{
    margin: 20px auto 0 auto;
    width: 250px;
}
.pic>img{
    width: 250px;
}
.pic_choose{
    position: relative;
    margin-top: 20px;
}
.pic_choose a img{
    height: 68px;
}
.pic_choose a:last-child{
    position: absolute;
    right: 0;
}
.explain{
    margin: 30px auto 0 auto;
    width: 800px;
}
.explain p:nth-child(19){
    margin-top: 70px;
}
.footer{
    margin-top: 150px;
}
